@Marienplatz: If this is a joke that the image I've uploaded is a bit large, I agree but am not sure how to change that. Otherwise, I don't understand your request; are you asking for a picture with more nodes?
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Charles StaatsOct 30 '13 at 16:15

@CharlesStaats Very nice solution. It's a pitty that render=0 never really works on such pictures, though (render=8 is fine of course, but I simply like vector images :)). I've taken the liberty of scaling down your output picture: I usually use something like <img src="http://i.stack.imgur.com/Umw1B.png" height="400"> for that. I hope you don't mind.
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PhilippOct 31 '13 at 16:09

@Philipp: Great improvement. I'll remember that for the future.
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Charles StaatsNov 10 '13 at 20:16